(4) Close the FWD cargo-compartment door 825 (Ref. TASK 52-30-00-860-002).
 (5) Remove the access platform(s). Subtask 30-73-53-862-056
 B. De-energize the ground service network (Ref. TASK 24-42-00-862-001).
R 1EFF : 151-199, 401-499, 1 30-73-53Page 409 1 1 Config-2 Aug 01/05 1 1 1CES 1

 HEATER ELEMENTS (4DW,331DW,332DW) - REMOVAL/INSTALLATION
________________________________________________________ TASK 30-73-53-000-003 Removal of the Potable-Water De-icing Heater Elements (4DW, 311DW, 321DW, 322DW
 , 323DW, 331DW, 332DW)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) No specific access platform 2 m (6 ft. 7 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001  Energize the Ground Service Network from the External Power 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump 30-73-53-991-003 Fig. 401
 3. Job Set-up
__________ Subtask 30-73-53-861-051
 A. Energize the ground service network (Ref. TASK 24-42-00-861-001).
 1EFF : 301-399, 1 30-73-53Page 401 1 1 Config-3 Aug 01/05R 1 1 1CES 1

 Subtask 30-73-53-865-056
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------

R 2000VU POT/WASTE WIP HEATER LINE 1DW A02 R 2000VU POT/WASTE WIP HEATER CTL 2DW A01
 Subtask 30-73-53-010-052
 C. Get Access
 (1)
 Put the access platform in position at the FWD cargo-compartment door

 825.

 (2)
 Open the FWD cargo-compartment door 825 (Ref. TASK 52-30-00-860-001).

 (3)
 Set the CARGO COMPT LIGHT switch 6LU to ON position.

 (4)
 In the FWD cargo compartment, remove the panels: 131GW, 131HW, 131MW, 131QW, 131RW, 131PW.

 4. Procedure
_________
 (Ref. Fig. 401/TASK 30-73-53-991-003)
 Subtask 30-73-53-020-052

 A. Removal of the Heater Elements
 (1)
 Remove the glass wool mats.

 (a)
 Cut the tie-down straps (2) that hold the glass wool mat (6) and remove the adhesive tape.

 (b)
 Remove the glass wool mats (6) and (1) that isolate the potable water pipe.

 (2)
 Remove the heater elements.

 (a)
 Disconnect the three wires (5) of the heater elements (3) from the terminal block.

 (b)
 Remove the adhesive tape (4) that attaches the heater elements (3).

 Heater Elements
 Figure 401/TASK 30-73-53-991-003

 (c) Remove the heater elements (3).

 TASK 30-73-53-400-003
 Installation of the Potable-Water De-icing Heater Elements (4DW, 311DW, 321DW, 322DW, 323DW, 331DW, 332DW)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 2 m (6 ft. 7 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
 the External Power 30-73-00-720-001 Functional Test of the Potable Water Ice-Protection 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the
 Yellow Electric Pump 52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump 30-73-53-991-003 Fig. 401
 3. Job Set-up
　
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